Year	current US$
1993	450.9800763444843
1994	329.22418198196465
1995	398.1136140940935
1996	454.3766497708706
1997	516.1286022854548
1998	423.4037111859899
1999	387.6894379520276
2000	556.8842529784877
2001	527.4641105187699
2002	872.6576313635089
2003	982.8055874491714
2004	1254.6961186129993
2005	1900.7238092379355
2006	2597.963586638595
2007	3121.34872503374
2008	4081.717506261822
2009	3123.6988851737356
2010	3586.6636935862075
2011	4608.155165726827
2012	5083.826873467353
2013	5061.349252974844
2014	5011.984427453595
2015	3217.339240054168
2016	1809.7093771945495
2017	2439.37443934002
2018	2540.508878845456
2019	2191.3477643353726
2020	1450.9051113941755
2021	1927.4740782768733
2022	2933.48464381415
2023	2309.5216202979054